BOTH INTERNATIONAL & INLAND What is the maximum length of a power-driven vessel which may show an all-round white light and sidelights instead of a masthead light, sidelights and a stern light?

Correct Answer: Option C — 11.9 meters

Rule 23(c) permits a power-driven vessel of less than 12 meters in length to exhibit an all-round white light and sidelights in lieu of the standard masthead, sidelights, and stern light configuration. Therefore, 11.9 meters is the maximum length allowed to utilize this simplified lighting arrangement.